The ratio of A and B is 4:3. If B increases by 28, the quotient of A divided by B is (2/5). What is A?
甲乙两数的比是4：3，如果乙数增加28，这时甲数除以乙数的商是(2/5)，甲数是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 28</gadget>
<output>56/5 = around 11.2</output>

<gadget id="calculator">(2/5) * 3</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">4 - (6/5)</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">(56/5) / (14/5)</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>