The distance from Xiaoliang's home to the Children's Palace is 4,710 meters. He rode a bicycle with a wheel diameter of about 20 centimeters to the Children's Palace. Calculated by the wheel turning 100 times per minute, how many minutes does it take him to ride this car to the Children's Palace?
小亮家到少年宫的距离是4710米，他骑一辆车轮外直径大约是20厘米的自行车去少年宫．按车轮每分钟转100圈计算，他骑这辆车去少年宫大约需要多少分钟？
<gadget id="calculator">4_710 * 100</gadget>
<output>471_000</output>

<gadget id="calculator">3.14 * 20 * 100</gadget>
<output>6_280</output>

<gadget id="calculator">471_000 / 6_280</gadget>
<output>75</output>

<result>75</result>