Blood can circulate in the human body for 180 cycles in 3600 seconds, how many cycles per minute on average?
血液在人体内3600秒能循环180周，平均每分循环多少周？
<gadget id="calculator">3_600 / 60</gadget>
<output>60</output>

<gadget id="calculator">180 / 60</gadget>
<output>3</output>

<result>3</result>