According to the survey, there are 342 students in the school whose blood is type A, accounting for 18% of the total number of students in the school.
据调查，学校有342名学生的血液属A型，占全校人数的18%，则全校有多少人．
<gadget id="calculator">18 / 100</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">342 / (9/50)</gadget>
<output>1_900</output>

<result>1_900</result>