box of milk weighs (3/5) kilograms, what is the weight of 4 boxes of milk in kilograms?
一盒牛奶重(3/5)千克，4盒牛奶重多少千克．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 4</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>