Please answer the following question by reasoning step-by-step.
Danielle's apartment has 6 rooms. Heidi's apartment has 3 times as many rooms as Danielle's apartment. Grant's apartment has 1/9 as many rooms as Heidi's apartment. How many rooms does Grant's apartment have?

2
Heidi's apartment has 6 * 3 = 18 rooms.

Grant's apartment has 18 / 9 = 2 rooms.

.

Thus, the answer is 2