**7. Quantum circuits for multiplication of floating-point numbers**

In the interest of brevity, only the main features of the quantum circuits used for multiplication of two quantum floating-point numbers are summarized here. **Figure 7** illustrates the quantum circuit used to compute the product of the mantissas of two inputs. Compared to the circuit shown in **Figure 2** the main difference is that ancilla qubit ∣*a*0i is now set using the mantissa of a second input. A further difference relative to the squaring operation occurs in the circuit used to obtain the result exponent. Here, instead of setting 2� the exponent using a bit shift, the sum of the two input exponents needs to be computed employing a quantum full adder.
