The fertilizer factory planned to produce a batch of fertilizers in April, but actually completed the plan (1/3) in the first ten days, completed the planned (2/5) in the middle ten days, and produced 52 tons in the second ten days, which turned out to be overrun (1/6). How many tons of chemical fertilizers are planned to be produced in a month?
化肥厂四月份计划生产一批化肥，实际上旬完成了计划的(1/3)，中旬完成了计划的(2/5)，下旬又生产了52吨，结果超额了(1/6)，四月份计划生产化肥多少吨？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/6) - (1/3) - (2/5)</gadget>
<output>-17/30 = around -0.566667</output>

<gadget id="calculator">1 + (-17/30)</gadget>
<output>13/30 = around 0.433333</output>

<gadget id="calculator">52 / (13/30)</gadget>
<output>120</output>

<result>120</result>