(SOLVED) The variable gets +1 per tick for each entity within the radius of a square cube

I have created a procedure for a block that determines if there is an entity within a radius of 10 blocks, then the block variable gets +1. The fact is that if there is more than 1 entity in the radius, then the variable is replenished faster for each entity in the radius. That is, if 2 entities are included in the radius, then the variable gets +2. It shouldn't be like this! The variable should receive +1, even if there are 100 entities within a radius. I tried to find a solution, but I couldn't.