The sika deer can run 90 kilometers per hour at the fastest speed, which is 20 kilometers less than the fastest speed of the cheetah (1/2). How many kilometers per hour can a cheetah run at its fastest?
梅花鹿最快每小时能跑90千米，比猎豹最快速度的(1/2)少20千米．猎豹最快每小时能跑多少千米？
<gadget id="calculator">90 + 20</gadget>
<output>110</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">110 / (1/2)</gadget>
<output>220</output>

<result>220</result>