1. The problem is to multiply the numbers 291387 and 299874. 2. The multiplication formula is straightforward: $$a \times b$$ where $a=291387$ and $b=299874$. 3. Multiply the two numbers: $$291387 \times 299874$$ 4. Performing the multiplication step-by-step or using a calculator, we get: $$291387 \times 299874 = 87399983438$$ 5. Therefore, the final answer is: $$87399983438$$