Grandpa’s hoop has a diameter of 60cm, and it has to roll 90 times from one end of the playground to the other; Xiaoming’s hoop has a diameter of 40cm, how many times does it take to roll from one end of the playground to the other?
爷爷的铁环直径是60cm，从运动场的一端滚到另一端转了90圈；小明的铁环直径40cm，它从运动场的一端滚到另一端要滚多少圈？
<gadget id="calculator">3.14 * 60 * 90</gadget>
<output>16_956</output>

<gadget id="calculator">3.14 * 40</gadget>
<output>125.6</output>

<gadget id="calculator">16_956 / 125.6</gadget>
<output>135</output>

<result>135</result>