The street invested 420,000 yuan this year to implement the poverty alleviation plan, which is 1/2 more than last year. How much was the investment last year?
街道今年投资42万元实行扶贫计划，比去年多投资(1/2)，去年投资多少万元？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">42 / (3/2)</gadget>
<output>28</output>

<result>28</result>