Cement plants produced 8,400 tons of cement in March, which was 1/3 more than in February. How many tons of cement were produced in February?
水泥厂三月份生产水泥8400吨，比二月份增产(1/3)．二月份生产水泥多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">8_400 / (4/3)</gadget>
<output>6_300</output>

<result>6_300</result>