A female athlete runs 300 meters per minute, which is 20 meters less than a male athlete (4/5). How many meters does a male athlete run per minute?
女运动员每分钟跑300米，比男运动员每分钟跑的(4/5)还少20米，男运动员每分钟跑多少米？
<gadget id="calculator">300 + 20</gadget>
<output>320</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">320 / (4/5)</gadget>
<output>400</output>

<result>400</result>