Hav Co (6/13)

Hi, I would like to ask regarding the current value calculations for both Hav Co and Strand Co (b). To find Strand Co's current value is to take the estimated P/E ratio multiply by post PAT in 20x3. To find Hav Co's current value, they take the share price times number of shares. However, I do not get the same answer if I take Hav's P/E ratio times the post PAT. Same goes to when I tried multiplying Strand's share price with number of share. Why is that ? How would I know which method to use ?