100 Toilets Level 40 Walkthrough:
Pick up the tablet.
Open Excel in the tablet (The green X)
It will give you the clue:
A4 x B1 + D3 x C4
Look at the shelves next to the toilet and find A4, B1, D3, and C4.
A4 = SEVEN = 7
B1 = XV = 15
D3 = 8
C4 = 3
Put it into the clue:
7 x 15 + 8 x 3 = 129
Proceed to the next 100 Toilets level!
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