Master Zhao processed a batch of parts, and processed these parts every day (4/15), and processed 240 parts in 2 days. How many parts are there in this batch?
赵师傅加工一批零件，每天加工这批零件的(4/15)，2天加工了240个零件．这批零件有多少个？
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(4/15) * 2</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">240 / (8/15)</gadget>
<output>450</output>

<result>450</result>