Three children, A, B, and C, have accumulated some pocket money. A saves more money than B (1/5), and B saves 20% less money than C. It is known that A saves 4 yuan less than C. Q: How much money has C accumulated?
甲乙丙三个小朋友都积攒了一些零花钱，甲的存钱比乙多(1/5)，乙存的钱比丙少20%，已知甲比丙少存4元．问：丙积攒了多少元．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(4/5) * (6/5)</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">1 - (24/25)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">4 / (1/25)</gadget>
<output>100</output>

<result>100</result>