There are 2007 lights that are on, each controlled by a pull-wire switch. Pull the pull-wire switch once and the light will turn off, and then pull the switch again to turn the lights off. Now number the lights as 1, 2, ..., 2007 according to their order, and then Pull all the light wires numbered in multiples of 2 once, then pull all the light wires numbered in multiples of 3, and finally pull all the light wires numbered in multiples of 5, the lights that are on after three pulls are how many cups
有2007盏亮着的灯，各有一个拉线开关控制着，拉一下拉线开关灯会灭掉，再拉一下灯由灭变亮，现按其顺序将灯编号为1，2，…，2007，然后将编号为2的倍数的灯线都拉一下，再将编号为3的倍数的灯线都拉一下，最后将编号为5的倍数的灯线都拉一下，三次拉完后亮着的灯有多少盏多少
<gadget id="calculator">2_007 - 1</gadget>
<output>2_006</output>

<gadget id="calculator">2_006 / 2</gadget>
<output>1_003</output>

<gadget id="calculator">2_007 - 3</gadget>
<output>2_004</output>

<gadget id="calculator">2_004 / 6</gadget>
<output>334</output>

<gadget id="calculator">2_007 - 7</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 10</gadget>
<output>200</output>

<gadget id="calculator">1_003 - 334 - 200</gadget>
<output>469</output>

<gadget id="calculator">2_007 - 27</gadget>
<output>1_980</output>

<gadget id="calculator">1_980 / 30</gadget>
<output>66</output>

<gadget id="calculator">469 + 66</gadget>
<output>535</output>

<gadget id="calculator">2_007 / 3</gadget>
<output>669</output>

<gadget id="calculator">2_007 - 12</gadget>
<output>1_995</output>

<gadget id="calculator">1_995 / 15</gadget>
<output>133</output>

<gadget id="calculator">669 - 334 - 133</gadget>
<output>202</output>

<gadget id="calculator">202 + 66</gadget>
<output>268</output>

<gadget id="calculator">2_007 - 2</gadget>
<output>2_005</output>

<gadget id="calculator">2_005 / 5</gadget>
<output>401</output>

<gadget id="calculator">401 - 200 - 133</gadget>
<output>68</output>

<gadget id="calculator">68 + 66</gadget>
<output>134</output>

<gadget id="calculator">2_007 - 535 - 268 - 134 - 66</gadget>
<output>1_004</output>

<result>1_004</result>