There used to be a batch of refrigerators in a store, but after they were sold (5/7), 54 more refrigerators were shipped in. At this time, there were fewer refrigerators than before (1/5). How many refrigerators do you have?
某商店原来有一批电冰箱，卖出(5/7)后，又运进54台，这时现有的冰箱比原来少(1/5)．原来有冰箱多少台？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 - (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (1/5) - (2/7)</gadget>
<output>18/35 = around 0.514286</output>

<gadget id="calculator">54 / (18/35)</gadget>
<output>105</output>

<result>105</result>