Two people work together to produce a batch of parts, which can be completed in 6 days. It is known that A produces 120 pieces per day, which is 2/3 of B's work efficiency. How many parts are there in this batch?
两人一起生产一批零件，6天可以完成，已知甲每天生产120个，是乙工作效率的(2/3)，这批零件共有多少个？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">120 / (2/3)</gadget>
<output>180</output>

<gadget id="calculator">180 + 120</gadget>
<output>300</output>

<gadget id="calculator">300 * 6</gadget>
<output>1_800</output>

<result>1_800</result>