3,947:(3,6-2,6*4*0,25)

To solve the expression \( 3,947 : (3,6 - 2,6 \times 4 \times 0,25) \), we need to follow the order of operations (parentheses, exponents, multiplication and division from left to right, addition and subtraction from left to right).

1. Start with the multiplication inside the parentheses: \[ 2,6 \times 4 \times 0,25 \]

   • First, calculate \( 2,6 \times 4 = 10,4 \).
   • Then, calculate \( 10,4 \times 0,25 = 2,6 \).

2. Now substitute back into the expression: \[ 3,6 - 2,6 \]

   • Now perform the subtraction: \( 3,6 - 2,6 = 1,0 \).

3. Now substitute back into the original division: \[ 3,947 : 1,0 \]

   • Since dividing by 1 does not change the value, we have \( 3,947 \).

Thus, the result of the expression is: \[ 3,947 \]