The maximum speed of the African wild dog is 56 km/h, which is 19.6 km more than the maximum speed of the ostrich (1/2). What is the top speed of an ostrich in km/h?
非洲野狗的最高速度是56千米/时，比鸵鸟最高速度的(1/2)多19.6千米．鸵鸟的最高速度是多少千米/时？
<gadget id="calculator">56 - 19.6</gadget>
<output>36.4</output>

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

<gadget id="calculator">36.4 / (1/2)</gadget>
<output>72.8</output>

<result>72.8</result>