A is 3 more than B. The ratio of A and B is 5:3. What is the number of A?
甲比乙多3，甲、乙两数的比是5：3，甲数是多少．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) * 3</gadget>
<output>5</output>

<gadget id="calculator">(5/3) - 1</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">5 / (2/3)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>