The sum of (2/3) and (1/2) is multiplied by a number, and the product obtained is (3/8). What is this number?
(2/3)与(1/2)的和乘一个数，所得的积是(3/8)，这个数是多少？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) + (1/2)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">(3/8) / (7/6)</gadget>
<output>9/28 = around 0.321429</output>

<result>9/28 = around 0.321429</result>