Subtract a certain number from the numerator of the fraction (35/64), and add this number to the denominator to obtain (1/2). What is the number?
分数(35/64)的分子减去某数，而分母加上这个数，约分后为(1/2)，求这个数是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 64</gadget>
<output>32</output>

<gadget id="calculator">35 - 32</gadget>
<output>3</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 / (3/2)</gadget>
<output>2</output>

<result>2</result>