Yaxin Fertilizer Plant produced 990 tons of urea in May, 10% more than in April. How many tons of urea did it produce in April?
亚新化肥厂五月份产尿素990吨，比四月份增产10%，四月份产尿素多少吨？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">990 / (11/10)</gadget>
<output>900</output>

<result>900</result>