The doctor prescribed two bottles of medicine to Grandma Wang. The bottle label said "0.2mg*180 tablets", and the doctor's prescription said "3 times a day, 0.4mg each time, 10 days as a course of treatment". How many courses of treatment can the medicine prescribed be taken?
医生给王奶奶开了两瓶药，药瓶标签上写着"0.2mg*180片"，医生的处方上写着"每天3次，每次0.4mg，10天为一个疗程"，给王奶奶开的药大约可服多少个疗程．
<gadget id="calculator">0.4 / 0.2</gadget>
<output>2</output>

<gadget id="calculator">2 * 3 * 10</gadget>
<output>60</output>

<gadget id="calculator">180 / 60</gadget>
<output>3</output>

<result>3</result>