Xiaoming's father has a heartbeat of about 72 times per minute, and the heart can discharge 70 milliliters of blood every time it beats, so the total amount of blood passing through the heart in one hour is about how many liters.
小名的爸爸每分钟心跳72次左右，每跳动一次心脏就能排出70毫升血液，则一个小时通过心脏的血液总量大约多少升．
<gadget id="calculator">70 / 1_000</gadget>
<output>7/100 = around 0.07</output>

<gadget id="calculator">(7/100) * 72 * 60</gadget>
<output>1_512/5 = around 302.4</output>

<result>1_512/5 = around 302.4</result>