There is a 180 cm long rope, starting from the right end, mark every 3 cm, and starting from the left end, mark every 4 cm, and then cut along the marked place, how many pieces of the rope are cut into one centimeter long ．
有一根180厘米长的绳子，从右端开始每隔3厘米做一个记号，从左端开始，每隔4厘米也做一个记号，然后沿有记号的地方剪断，绳子被剪成一厘米长的有多少段．
<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<gadget id="calculator">60 - 1</gadget>
<output>59</output>

<gadget id="calculator">180 / 4</gadget>
<output>45</output>

<gadget id="calculator">45 - 1</gadget>
<output>44</output>

<gadget id="calculator">180 / 12</gadget>
<output>15</output>

<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">44 - 14</gadget>
<output>30</output>

<gadget id="calculator">59 + 30</gadget>
<output>89</output>

<gadget id="calculator">89 + 1</gadget>
<output>90</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">90 * (1/3)</gadget>
<output>30</output>

<result>30</result>