flour mill grinds (2/3) tons of flour per hour, how many tons of flour is ground in (3/4) hours.
一台磨面机每小时磨面粉(2/3)吨，(3/4)小时磨面粉多少吨．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/3) * (3/4)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>