Master Li completed the processing of a batch of parts in three days. The ratio of the number of parts processed on the first day to the total number of parts was 2:9. On the second day, 180 parts were processed. The number of parts processed in the first two days just accounted for the total number of parts. of (2/3). How many parts did Master Li process on the first day?
李师傅三天完成一批零件的加工任务，第一天加工的零件数与总零件数的比是2：9，第二天加工了180个零件，前二天加工的零件数正好占总零件数的(2/3)．李师傅第一天加工了多少个零件？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/3) - (2/9)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">180 / (4/9)</gadget>
<output>405</output>

<gadget id="calculator">405 * (2/9)</gadget>
<output>90</output>

<result>90</result>