100Floors level 98

STEP 1

Startup screen. The forumula above the door is the hint.

STEP 2

Use the brush to clean the area at low left of the wall.

STEP 3

The hint indicates that each numbers in left term consists of how many digital elements. Now you have a number 51782. So enter the answer, 52375, and press the enter button on the door to open it.

STEP 4

Escaped.