The wheel rotates 100 times per minute and its diameter is 70 cm. How many minutes does it take to pass the 1099-meter-long bridge?
车轮每分钟转100周，它的直径是70厘米．要通过1099米长的大桥需要几分钟？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">3.14 * (7/10) * 100</gadget>
<output>219.8</output>

<gadget id="calculator">1_099 / 219.8</gadget>
<output>5</output>

<result>5</result>