little monkey walks a tightrope on a unicycle. The diameter of the wheel is 50cm. If it walks a 23.55m long steel wire, how many revolutions does the wheel have to rotate?
小猴子骑独轮车走钢丝，车轮直径是50cm，走过23.55m长的钢丝，车轮要转动多少周？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3.14 * (1/2)</gadget>
<output>1.57</output>

<gadget id="calculator">23.55 / 1.57</gadget>
<output>15</output>

<result>15</result>