bottle of soy sauce (5/2) liters is used (3/10), how many liters are used?
一瓶酱油(5/2)升，用去(3/10)，用去了多少升？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(5/2) * (3/10)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>