​Using BODMAS, simplify the following.​

​$$\frac{7}{9}×\frac{21}{5}×25(62^2-55^2)$$​​

Correct option is A

Given:
​$$\frac{7}{9}×\frac{21}{5}×25(62^2-55^2)$$ 
Formula Used:
​$$a^2 - b^2 = (a+b) (a-b)$$ 
Solution:
 $$\frac{7}{9}×\frac{21}{5}×25(62^2-55^2) \\\ \\=\frac{7}{9}×\frac{21}{5}×25[(62-55)(62+55)] \\\ \\= \frac{7}{9}×\frac{21}{5}×25[7 \times 117] \\\ \\= \frac{7}{9}×\frac{21}{5}×25× 7 \times 117 = 66885$$​​