let one number by x; then:
the other number is x + 3.56;
their product is x(x + 3.56) = 57.2045
→ x² + 3.56x = 57.2045
→ x² + 3.56x - 57.2045 = 0
→ (x - 5.99)(x + 9.55) = 0
→ x - 5.99 = 0 → x = 5.99 and the other number is 9.55
or x + 9.55 = 0 → x = -9.55 and the other number is -5.99