A rectangular vegetable field is (5/8) km long and (1/4) km wide. What is the area of this vegetable field in square kilometers?
一块长方形菜地，长(5/8)km，宽(1/4)km，这块菜地的面积是多少平方千米？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(5/8) * (1/4)</gadget>
<output>5/32 = around 0.15625</output>

<result>5/32 = around 0.15625</result>