Two belt pulleys connected together, the radius of the big pulley is 0.54m, and the radius of the small pulley is 0.18m, how many times does the big pulley make one revolution of the small pulley?
两个连在一起的皮带轮，大轮的半径0.54米，小轮半径0.18米，大轮转一周小轮转多少周．
<gadget id="calculator">3.14 * 0.54 * 2</gadget>
<output>3.3912</output>

<gadget id="calculator">3.14 * 0.18 * 2</gadget>
<output>1.1304</output>

<gadget id="calculator">3.3912 / 1.1304</gadget>
<output>3</output>

<result>3</result>