South Georgia and South Sandwich Islands is about 193 times smaller than Zambia.

Zambia is approximately 752,618 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 0.52% the size of Zambia.
Tip: This to-scale comparison of Zambia vs. South Georgia and South Sandwich Islands uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: South Georgia and South Sandwich Islands vs. Zambia