Geirrod was a giant in Norse mythology, and was one of the most feared and powerful of them all. he was the son of giant AEgir and his wife Ran. He was known for his superhuman strength, his boundless cruelty and his thirst for revenge ........
But these no need for any of that in the lovely Spring Farm!
The cache is not at the posted coordinates, but the information you need to find the final location is.
At the posted coordinates, look to your feet to see a two digit number. The same number is repeated in the location, but you need just one of the pair of numbers. Let this number = AB.
The final location can be found at;
S34 04. (AB x 5) + 6
E150 44. (AB x 8) + 23
Checksum (last three digits) ; S = 16, E = 12