How to adjust block height with other blocks?

Question

css

How to automatically adjust the height of the orange block with other, gray blocks? We want the orange block to take the height of two blocks automatically.
Only without using flexbox. To work on all older versions of browsers.

Answer 1

In general, you can use a javascript like) Use it if the TK allows

Answer 2

Create a div that will have all the gray boxes and the orange one. Set the orange one to height:100%;

Answer 3

for the orange block, set height:100%; have you tried?