cheetah runs 110 kilometers per hour, which is 30 kilometers more than twice that of an elephant. How many kilometers can an elephant run per hour? (solution by equation)
猎豹每小时跑110千米，比大象的2倍多30千米，大象每小时能跑多少千米？(用方程解)
<gadget id="calculator">110 - 30</gadget>
<output>80</output>

<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<result>40</result>