Two large and small wheels connected by a belt, the radius of the big wheel is 3 decimeters, and the diameter of the small wheel is 1.5 decimeters. If the big wheel turns once, how many times will the small wheel turn?
用皮带连接着的大小两个轮子，大轮半径3分米，小轮直径1.5分米．如果大轮转一周，小轮要转几周？
<gadget id="calculator">3.14 * 3 * 2</gadget>
<output>18.84</output>

<gadget id="calculator">3.14 * 1.5</gadget>
<output>4.71</output>

<gadget id="calculator">18.84 / 4.71</gadget>
<output>4</output>

<result>4</result>