Master Li processes a batch of parts. The ratio of the number of completed parts to the number of unfinished parts on the first day is 1:3. If he processes 24 more, he can complete half of this batch of parts. How many parts are there in this batch? (solution with equation)
李师傅加工一批零件，第一天完成零件个数与未完成零件个数比是1：3．如果再加工24个，他就可以完成这批零件的一半，这批零件共有多少个？(用方程解答)
<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">24 + 72</gadget>
<output>96</output>

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

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

<gadget id="calculator">(3/2) - 1</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">96 / 1</gadget>
<output>96</output>

<result>96</result>