After multiplying the numerator and denominator of (2/5) by the same number, add 15 to each, and divide it equally to get (3/5). What is the number multiplied by the numerator and denominator.
把(2/5)的分子分母乘以一个相同的数后，又各加15，再均分得到(3/5)．与分子分母相乘的数是多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 15</gadget>
<output>9</output>

<gadget id="calculator">15 - 9</gadget>
<output>6</output>

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

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">6 / 1</gadget>
<output>6</output>

<result>6</result>