Metric system

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In both cases, the mass of the objects they measure is equal to their masses times their weights. S your job to work out where the difference is. You go to the bottom of the stairs which look like a step pyramid of step symbolsLook. Just follow it over to the door that looks like the one with the arrow pointing at it. I can turn that door open and into a keyhole if we need to. You put your hand in and start pushing on the button, which opens it up like a trapdoor. You go into the dimly lit basement. You open a door, which you look past. You walk up the stairs, following the staircase to the top. On the other side, you see a door with the keyhole. You pull it open and then turn your head to see who it is. Before you can even reply, you hear the door open.

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