The chemical fertilizer factory produced 3,700 tons of fertilizers in September, of which the tonnage produced in the first ten days was the middle ten days (2/3), and the tonnages produced in the second ten days was the middle ten days (4/5). How many tons of fertilizer does the fertilizer factory produce in late September?
化肥厂九月份生产化肥3700吨，其中上旬生产的吨数是中旬的(2/3)，下旬生产的吨数是中旬的(4/5)．化肥厂九月份下旬生产化肥多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (2/3) + (4/5)</gadget>
<output>37/15 = around 2.466667</output>

<gadget id="calculator">3_700 / (37/15)</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 * (4/5)</gadget>
<output>1_200</output>

<result>1_200</result>