( 999 9991000 × 7 ) is equal to -

Answer: Option D

$$\begin{array}{rl}& =\left(999\frac{999}{1000}\times 7\right)\\ & =\left(999\frac{999}{1000}\right)\times 7\\ & =6993+\frac{6993}{1000}\\ & =6993+6\frac{993}{1000}\\ & =6993+6+\frac{993}{1000}\\ & =6999\frac{993}{1000}\end{array}$$