The fruit shop brings two kinds of apples and pears. The weight of the apples is 5/6 of the pears. After selling 20 kilograms of pears, the weight of the apples is 5/4 of the pears. How many kilograms are the apples? (unsolved equation)
水果店运来苹果和梨两种，苹果的重量是梨的(5/6)，卖掉20千克梨后，苹果的重量是梨的(5/4)，问苹果多少千克？(不解方程)
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) * 20</gadget>
<output>25</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/4) - (5/6)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">25 / (5/12)</gadget>
<output>60</output>

<gadget id="calculator">60 * (5/6)</gadget>
<output>50</output>

<result>50</result>