For a tractor, the diameter of the front wheels is 1 meter, and the diameter of the rear wheels is 1.5 meters. When the rear wheels make 6 revolutions, how many revolutions will the front wheels make?
一辆拖拉机，前轮的直径是1米，后轮直径为1.5米，后轮转6周时，前轮要转多少周．
<gadget id="calculator">3.14 * 1.5 * 6</gadget>
<output>28.26</output>

<gadget id="calculator">28.26 / 3.14</gadget>
<output>9</output>

<result>9</result>