Two men stand in a lift as four others, all dressed in black and bright yellow stripes, look up on them.
Six men dressed in black and yellow uniforms are standing in a gymnasium.
Only the 'four others' are implied as dressed this way, but nothing is actually stopping the other two from being so dressed; it's not impossible for a lift to exist in a gymnasium, so even the two who stand in a lift can be technically standing in a gymnasium.
two plus four is six
two plus four equal six.