A fixed magnetic field shows flux growing with area across three rows. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
One area unit sets two webers
With field 2 T and area 1 as the area value, flux is 2 Wb.
Φ=2×1=2
Doubling area doubles flux
With field 2 T and area 2 as the area value, flux is 4 Wb.
Φ=2×2=4
Four area units make eight webers
With field 2 T and area 4 as the area value, flux is 8 Wb.