The diameter of two connected pulley belts is 6 decimeters, the diameter of the small wheel is 2 decimeters and 4 cm, how many times does the small wheel make one revolution of the big wheel.
两个连在一起的皮轮带大轮直径是6分米，小轮直径是2分米4厘米，大轮转一周，小轮转多少周．
<gadget id="calculator">3.14 * 6</gadget>
<output>18.84</output>

<gadget id="calculator">3.14 * 2.4</gadget>
<output>7.536</output>

<gadget id="calculator">18.84 / 7.536</gadget>
<output>2.5</output>

<result>2.5</result>