The washing machine factory planned to produce 540 Little Swan washing machines in May, but it was completed in the first half of the month (5/9) and in the second half of the month (2/3). How many more washing machines will be produced this month than originally planned?
洗衣机厂五月份计划生产小天鹅牌洗衣机540台，结果上半月完成了(5/9)，下半月完成了(2/3)，这个月比原计划多生产洗衣机多少台？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) - 1</gadget>
<output>-1/3 = around -0.333333</output>

<gadget id="calculator">(5/9) + (-1/3)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">540 * (2/9)</gadget>
<output>120</output>

<result>120</result>