1. **Stating the problem:** We have an L-shaped figure made of two rectangles. The horizontal rectangle has width 7 m and length 20 m. The vertical rectangle has width 7 m and length 50 m. 2. **Goal:** Find the total area of the L-shaped figure by adding the areas of the two rectangles. 3. **Formula for area of a rectangle:** $$\text{Area} = \text{width} \times \text{length}$$ 4. **Calculate area of horizontal rectangle:** $$7 \times 20 = 140$$ square meters. 5. **Calculate area of vertical rectangle:** $$7 \times 50 = 350$$ square meters. 6. **Add the two areas to get total area:** $$140 + 350 = 490$$ square meters. 7. **Final answer:** The total area of the L-shaped figure is $490$ square meters.