In a subtraction formula, the sum of the minuend, the subtrahend and the difference is 120. The subtrahend is difference (1/3), what is the subtrahend?
在一道减法算式中，被减数、减数、差三个数的和是120．减数是差的(1/3)，减数是多少？
<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">60 / (4/3)</gadget>
<output>45</output>

<gadget id="calculator">45 * (1/3)</gadget>
<output>15</output>

<result>15</result>