37.5% of the number A is 20% less than the number B, the difference between A and B is 3.4, what is the sum of A and B?
甲数的37.5%比乙数少20%，甲乙差为3.4，甲乙和为多少．
<gadget id="calculator">37.5 / 100</gadget>
<output>0.375</output>

<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">0.375 / (4/5)</gadget>
<output>0.46875</output>

<gadget id="calculator">1 - 0.46875</gadget>
<output>0.53125</output>

<gadget id="calculator">3.4 / 0.53125</gadget>
<output>6.4</output>

<gadget id="calculator">6.4 - 3.4</gadget>
<output>3</output>

<gadget id="calculator">3 + 6.4</gadget>
<output>9.4</output>

<result>9.4</result>