Calculation: ((1*2*3+7*14*21)/(1*3*5+7*21*35))=how much.
计算：((1*2*3+7*14*21)/(1*3*5+7*21*35))=多少．
<gadget id="calculator">1 * 2 * 3</gadget>
<output>6</output>

<gadget id="calculator">7 * 14 * 21</gadget>
<output>2_058</output>

<gadget id="calculator">6 + 2_058</gadget>
<output>2_064</output>

<gadget id="calculator">1 * 3 * 5</gadget>
<output>15</output>

<gadget id="calculator">7 * 21 * 35</gadget>
<output>5_145</output>

<gadget id="calculator">15 + 5_145</gadget>
<output>5_160</output>

<gadget id="calculator">2_064 / 5_160</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>