Two wheels are connected together by a belt. The diameter of the big wheel is three times the diameter of the small wheel. If the big wheel rotates 100 times, how many times will the small wheel rotate?
两个用皮带连在一起的轮子，大轮直径是小轮直径的3倍，如果大轮转动100周，则小轮要转动多少周．
<gadget id="calculator">100 * 3</gadget>
<output>300</output>

<gadget id="calculator">300 / 1</gadget>
<output>300</output>

<result>300</result>