Li Village's grain output last year was 4,000 tons, and this year's output has increased by 15% compared with last year. How many tons of grain is produced this year?
李村去年粮食产量是4000吨，今年比去年增产了一成五．今年粮食产量是多少吨？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">4_000 * (23/20)</gadget>
<output>4_600</output>

<result>4_600</result>