The teacher distributes candy, can be divided into 5 pieces per person, can be divided into 7 pieces per person, can be divided into 9 pieces per person, so how many pieces of candy does the teacher have at least.
老师分糖，可以每人分5颗，可以每人分7颗，可以每人分9颗，那么老师最少有多少颗糖．
<gadget id="calculator">5 * 7 * 9</gadget>
<output>315</output>

<result>315</result>