An acrobat performs a unicycle tightrope walk. The diameter of the wheel is 40cm. To ride a 75.36m long steel wire, how many times does the wheel have to turn.
杂技演员表演独轮车走钢丝，车轮的直径是40cm，要骑过75.36m长的钢丝，车轮要转动多少圈．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3.14 * (2/5)</gadget>
<output>1.256</output>

<gadget id="calculator">75.36 / 1.256</gadget>
<output>60</output>

<result>60</result>