A and B share a certain amount of RMB. Among them, A accounts for (3/5), if B gives A 15 yuan, and the remaining money of B is 3 yuan less than the total (1/4), how much RMB are A and B in total?
甲、乙两人共有人民币若干元．其中甲占(3/5)，若乙给甲15元，乙余下的钱比总数的(1/4)少3元，甲、乙两人共有人民币多少元？
<gadget id="calculator">15 - 3</gadget>
<output>12</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">12 / (3/20)</gadget>
<output>80</output>

<result>80</result>