A vegetable field has (4/5) hectares, of which (3/4) is used to grow corn, how many hectares is the area for growing corn?
一块菜地有(4/5)公顷，其中的(3/4)用来种玉米，种玉米的面积是多少公顷？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * (3/4)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>