The diameter of the front wheel of a bicycle for children is 28 cm, and the diameter of the rear wheel is 35 cm. When the front wheel moves forward 40 times, how many times does the rear wheel travel?
一种儿童专用的自行车前轮直径是28cm，后轮直径是35cm，前轮向前行走40圈时，后轮行走多少圈．
<gadget id="calculator">3.14 * 28 * 40</gadget>
<output>3_516.8</output>

<gadget id="calculator">3.14 * 35</gadget>
<output>109.9</output>

<gadget id="calculator">3_516.8 / 109.9</gadget>
<output>32</output>

<result>32</result>