Master Zhang processes a batch of parts, the ratio of the number completed on the first day to the total number of parts is 1:3. If 36 more are processed, this batch of parts can be completed. How many parts are there in this batch?
张师傅加工一批零件，第一天完成的个数与零件总个数的比是1：3．如果再加工36个，就可以完成这批零件．这批零件共有多少个？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">36 / (2/3)</gadget>
<output>54</output>

<result>54</result>