$${Q = (8,5 \frac{\text{MeV}}{\text{nukleon}})(2 \text {nukliidi}) (120\frac{\text{nukleoni}}{\text{tuum}})\\ - (7,6\frac{\text{nukleoni}}{\text{tuum}}) (240 \text {nukleoni}) \approx 200\text{MeV}}$$