How much are five 50-cent banknotes?
5张5角钱的纸币是多少元．
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 * (1/2)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>