Transfer (1/4) of the grain stored in warehouse A to warehouse B, the grain stored in the two warehouses is equal, the original grain stored in warehouse B is the amount of warehouse A.
把甲仓存粮的(1/4)调入乙仓，两仓存粮相等，原来乙仓存粮是甲仓的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>