There are 1 gram, 5 gram, and 10 gram weights. Choose one or several of them. How many objects with different masses can be weighed on the balance.
有1克、5克、10克的砝码各一个，选其中的1个或几个，在天平上能称出多少种不同质量的物体．
<gadget id="calculator">3 + 3 + 1</gadget>
<output>7</output>

<result>7</result>