How to add units to grafana alerts

hey, how can we add units to grafana alerts metric like 10GB/100MB instead of just long float value (156543906.909)

check this email alert metrics

Metric name                                                      Value 

test_grafana.1.ik3tyjfv9vg78tjiwwatfxvld                         156543906.909

test_prometheus.1.yycb4sn8syr4i90eso9ixzfx4                      145992238.545

test_cadvisor.1.rd7leeyt3ycmtjuvlwdmvqcgn                          106926824.727

Please help us with this query.