There are two ships, the big ship can carry 5 tons of goods at a time, and the small ship can carry (2/5) the amount of goods carried by the big ship at a time. The goods that have been transported by the big ship 6 times, if they are transported by small ships, it will take several times to be transported.
有两只船，大船一次可以运载5吨货物，小船一次运载的货物量是大船的(2/5)．大船6次运完的货物，如果改用小船运，几次才能运完．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 * (2/5)</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>