Processing a batch of parts, it is known that 1/3 of all parts have been processed, and after processing 150 parts, it is known that the ratio of the processed parts to the rest is 2:3, how many parts are there in total?
加工一批零件，已知加工了全部的1/3，再加工的150个后，已知已加工的和剩下的比是2：3，求这批零件一共多少个？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) - (1/3)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">150 / (1/15)</gadget>
<output>2_250</output>

<result>2_250</result>