If the snail crawls (2/5) meters per minute, how many meters can it cover in (1/2) hour?
蜗牛每分爬行(2/5)米，(1/2)小时能爬行多少米．
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 30</gadget>
<output>12</output>

<result>12</result>