standard_description: Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.
problem_activity: Solve. Show or explain your work.
a.
$$0.35 \times 0.4$$
b.
$$2.02 \times 4.2 $$


aligns: no