(2/3) of the number A is equal to (4/5) of the number B, the number B is 10, what is the number A
甲数的(2/3)等于乙数的(4/5)，乙数是10，甲数是多少
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(4/5) / (2/3)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">10 * (6/5)</gadget>
<output>12</output>

<result>12</result>