There is a bag of sugar, counting 5 pieces of land by 5 pieces, just finished counting; How many pieces of sugar are there at least?
有一包糖，5块5块地数，正好数完；6块6块地数，也正好数完．这包糖最少有多少块？
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>