First convert the euros to pounds: 11 euros * 2 pounds/euro = <<11*2=22>>22 pounds.
Then add that amount to the amount Jack has in pounds: 22 pounds + 42 pounds = <<22+42=64>>64 pounds.
Then convert the pounds to yen: 64 pounds * 100 yen/pound = <<64*100=6400>>6400 yen.
Then add that amount to the amount Jack has in yen: 6400 yen + 3000 yen = <<6400+3000=9400>>9400 yen.
#### 9400