A batch of chemical fertilizers were produced in May. In fact, 1/3 of the plan was completed in the first half of the year, 40% of the plan was completed in the middle half of the year, and 52 tons were produced in the second half of the year, just in time to complete the task. How many tons of chemical fertilizers are planned to be produced?
五月份生产一批化肥，实际上旬完成计划的(1/3)，中旬完成计划的40%，下旬又生产了52吨，正好完成任务，计划生产化肥多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/3) + (2/5)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">1 - (11/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">52 / (4/15)</gadget>
<output>195</output>

<result>195</result>